:root {
  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);
  background-color: #242424;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
}

a {
  font-weight: 500;
  color: #646cff;
  text-decoration: inherit;
}
a:hover {
  color: #535bf2;
}

body {
  margin: 0;
  display: flex;
  place-items: center;
  min-width: 320px;
  min-height: 100vh;
}

h1 {
  font-size: 3.2em;
  line-height: 1.1;
}

#root {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem;
  text-align: center;
}

.logo {
  height: 6em;
  padding: 1.5em;
  will-change: filter;
  transition: filter 300ms;
}
.logo:hover {
  filter: drop-shadow(0 0 2em #646cffaa);
}
.logo.react:hover {
  filter: drop-shadow(0 0 2em #61dafbaa);
}

@keyframes logo-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: no-preference) {
  a:nth-of-type(2) .logo {
    animation: logo-spin infinite 20s linear;
  }
}

.card {
  padding: 2em;
}

.read-the-docs {
  color: #888;
}

button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: #1a1a1a;
  color: inherit;
  cursor: pointer;
  transition: border-color 0.25s;
}
button:hover {
  border-color: #646cff;
}
button:focus,
button:focus-visible {
  outline: 4px auto -webkit-focus-ring-color;
}

@media (prefers-color-scheme: light) {
  :root {
    color: #213547;
    background-color: #ffffff;
  }
  a:hover {
    color: #747bff;
  }
  button {
    background-color: #f9f9f9;
  }
}

/* 学习项目专用样式 */
.learning-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  text-align: left;
}

.example-section {
  margin-bottom: 40px;
  padding: 20px;
  border: 1px solid #ddd;
  border-radius: 8px;
  background-color: #f9f9f9;
}

.example-title {
  color: #333;
  border-bottom: 2px solid #646cff;
  padding-bottom: 10px;
  margin-bottom: 20px;
}

.code-block {
  background-color: #f5f5f5;
  padding: 15px;
  border-radius: 5px;
  margin: 10px 0;
  font-family: 'Courier New', monospace;
  overflow-x: auto;
}

.navigation {
  background-color: #f8f9fa;
  padding: 20px;
  margin-bottom: 30px;
  border-radius: 8px;
}

.navigation ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 10px;
}

.navigation li {
  background-color: #e9ecef;
  padding: 10px;
  border-radius: 5px;
  transition: background-color 0.3s;
}

.navigation li:hover {
  background-color: #dee2e6;
}

.navigation a {
  text-decoration: none;
  color: #495057;
  font-weight: 500;
}

.demo-container {
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 20px;
  margin: 20px 0;
  background-color: white;
}

.demo-title {
  font-size: 1.2em;
  font-weight: bold;
  margin-bottom: 15px;
  color: #333;
}

.demo-content {
  padding: 15px;
  background-color: #f8f9fa;
  border-radius: 5px;
}